A071864 - cp's OEIS frontend

A071864 Nonprime n such that the number of elements in the continued fraction for Sum_{d|n} 1/d equals tau(n), the number of divisors of n.

n	a(n)
1	1
2	4
3	9
4	14
5	15
6	21
7	25
8	49
9	51
10	55
11	57
12	63
13	95
14	98
15	99
16	115
17	116
18	121
19	147
20	161
21	169
22	172
23	175
24	188
25	195
26	203
27	236
28	244
29	245
30	247
31	265
32	284
33	287
34	289
35	297
36	299
37	322
38	328
39	329
40	351
41	356
42	361
43	363
44	370
45	371
46	374
47	387
48	406
49	412
50	413
51	418
52	423
53	425
54	437
55	465
56	488

[1, 4, 9, 14, 15, 21, 25, 49, 51, 55, 57, 63, 95, 98, 99, 115, 116, 121, 147, 161, 169, 172, 175, 188, 195, 203, 236, 244, 245, 247, 265, 284, 287, 289, 297, 299, 322, 328, 329, 351, 356, 361, 363, 370, 371, 374, 387, 406, 412, 413, 418, 423, 425, 437, 465, 488]

cp's OEIS Frontend

A071864 Nonprime n such that the number of elements in the continued fraction for Sum_{d|n} 1/d equals tau(n), the number of divisors of n.

Table of values

List of values

n	a(n)
1	1
2	4
3	9
4	14
5	15
6	21
7	25
8	49
9	51
10	55
11	57
12	63
13	95
14	98
15	99
16	115
17	116
18	121
19	147
20	161
21	169
22	172
23	175
24	188
25	195
26	203
27	236
28	244
29	245
30	247
31	265
32	284
33	287
34	289
35	297
36	299
37	322
38	328
39	329
40	351
41	356
42	361
43	363
44	370
45	371
46	374
47	387
48	406
49	412
50	413
51	418
52	423
53	425
54	437
55	465
56	488

n	a(n)
1	1
2	4
3	9
4	14
5	15
6	21
7	25
8	49
9	51
10	55
11	57
12	63
13	95
14	98
15	99
16	115
17	116
18	121
19	147
20	161
21	169
22	172
23	175
24	188
25	195
26	203
27	236
28	244
29	245
30	247
31	265
32	284
33	287
34	289
35	297
36	299
37	322
38	328
39	329
40	351
41	356
42	361
43	363
44	370
45	371
46	374
47	387
48	406
49	412
50	413
51	418
52	423
53	425
54	437
55	465
56	488

n	a(n)
1	1
2	4
3	9
4	14
5	15
6	21
7	25
8	49
9	51
10	55
11	57
12	63
13	95
14	98
15	99
16	115
17	116
18	121
19	147
20	161
21	169
22	172
23	175
24	188
25	195
26	203
27	236
28	244
29	245
30	247
31	265
32	284
33	287
34	289
35	297
36	299
37	322
38	328
39	329
40	351
41	356
42	361
43	363
44	370
45	371
46	374
47	387
48	406
49	412
50	413
51	418
52	423
53	425
54	437
55	465
56	488